언제나 작은 미스터리가 주변을 멤도는 책. 이번 편에서도 책이 사라지는 작은 미스테리가 발생했고, 그 주인공과 친구들은 평소에 그래왔던 것처럼 서로의 문제를 해결해준다. 이번 편에서는, 발표 준비를 위해 도서관에서 책을 빌린 린이 책이 사라지는 곤란을 겪은 일이다. 누가, 어떤 목적을 가지고 그녀에게서 책을 훔쳤는가?
They are really small, easy mysteries, but I still like them because they are quite fun. Lin had to prepare presentation by her book, but someone stole her book. This must be a one who wanted to get a better grade than Lin. At first, Lin's friends and teacher didn't thought someone stole her book. They thought there was no reason to do that. However, there was a one who just wanted to be the first.
Making others in trouble is not the way to make themselves better. They should try harder to win, not making others in trouble. Kris wanted to win Lin by making her hard, but she couldn't do that because Lin had good friends. So, this mystery solved well this time, too.